Also some real screenshots; e.g. https://www.youtube.com/watch?v=Jy6tQsyd4ho
-I haven't found a datasheet for the SN74S262/3, but the schematic in the
-ABC80 service manual provides a pinout:
-
-4-7: row address 0-3
-8,9,11-13: data 0-4
-16-19,1-3: character address 0-6
-20: Vcc
+I haven't found a datasheet for the SN74S262/3, but the schematics in the
+ABC80 and RML 380Z service manuals provides a pinout:
+
+1: D4
+2: D5
+3: D6
+4: RA (row address)
+5: RB
+6: RC
+7: RD
+8: Y1 (output)
+9: Y2
10: Gnd
-14,15: "two chip enables" (Gnd on ABC80)
+11: Y3
+12: Y4
+13: Y5
+14: CS*
+15: CS*
+16: D0 (character address)
+17: D1
+18: D2
+19: D3
+20: Vcc